You'll get the most bloom for your buck by planting ground covers with long flowering cycles: plants such as ajuga (Ajuga reptans), periwinkle (Vinca minor), mock strawberry (Duchesnea indica), bunchberry (Cornus canadensis), and golden moneywort (Lysimachia nummularia ?Aurea?). For maximum coverage, place smaller varieties as close as 6 inches apart. An equal-sided cardboard triangle is a handy spacing guide; position the triangle on the ground and place a plant at each point. This planting technique gives your landscape a flowing look as opposed to an all-in-a-row appearance.